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Self-assembled porous nano-composite with high catalytic performance by reduction of tetragonal spinel CuFe2O4

Paper ID Volume ID Publish Year Pages File Format Full-Text
42124 45911 2010 9 PDF Available
Title
Self-assembled porous nano-composite with high catalytic performance by reduction of tetragonal spinel CuFe2O4
Abstract

A tetragonal spinel CuFe2O4 reduced in H2 flow at 633 K shows a self-assembled microstructure that exhibits fine dispersion of copper nanoparticles within the porous Fe3O4 matrix and high catalytic performance. Sintering of copper particles was inhibited significantly even after H2 reduction at 873 K when CuFe2O4 was used as a precursor, while it readily occurred for CuO and physically mixed CuO + Fe2O3. The high thermal stability of copper nanoparticles from the CuFe2O4 after H2 reduction is ascribed to the immiscible interaction between copper and iron (or iron oxides). The spinel CuFe2O4 can be regenerated after an intentional sintering treatment (e.g., in H2 at 873 K) by calcinations in air at 1273 K where the activity and the morphology restored completely. We show that metallurgical knowledge is available to tailor microstructure for designing catalysts.

Graphical abstractA tetragonal spinel CuFe2O4, which shows a self-assembled microstructure, including fine dispersion of copper nanoparticles within the porous Fe3O4 matrix after a H2 treatment at 633 K, is a regenerable precursor as a high performance composite catalyst. We show that metallurgical knowledge is available to tailor microstructures for designing catalysts.Figure optionsDownload full-size imageDownload high-quality image (81 K)Download as PowerPoint slide

Keywords
Reduction of tetragonal spinel CuFe2O4; Precursor; Self-assembled porous nano-composite copper–iron; Immiscible; High catalytic performance; Methanol steam reforming
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 375, Issue 1, 26 February 2010, Pages 163–171
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us